All it takes is a data breach at one site to give hackers access to people's login information, which they'll then use to login to other sites. That can be used to login to more sites, if hackers are targeting lots of sites by using a strategy called "credential stuffing." The article explains how hackers use a bot to test a list of stolen login credentials on other sites. https://mahadevbook279011.veronicablog.com/62315686/the-shiva-chronicle